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Initiated by the Library of Congress, BIBFRAME (Bibliographic Framework) is an initiative to evolve bibliographic description standards to a linked data model, in order to make bibliographic information more useful both within and outside the library community. BIBFRAME provides a foundation for the future of bibliographic description, both on the web, and in the broader networked world that is grounded in Linked Data techniques.

This CIDOC Conceptual Reference Model (CRM) is a formal ontology intended to facilitate the integration, mediation and interchange of heterogeneous cultural heritage information. CIDOC-CRM aims to manage and document cultural heritage data, convert the catalog content of institutes to high-valued data, and thereby enable semantic interoperability. Embedded in a semantic data structure, the model also helps to preserve the data's specific meaning and support the integration and richness of data content.

Developed by the Dublin Core Metadata Initiative (DCMI), the Dublin Core (DC) is a set of simple, universal, extensible and international metadata standards to describe a wide range of online data and serve as an exchange format for interdisciplinary data-sharing. By mapping to the DC elements, information derived from different collection agencies can be exchanged and shared with each other.

The Europeana Data Model (EDM) is a new proposed data standard for structuring the data that Europeana will be ingesting, managing and publishing. EDM is not built on any particular community standard but rather adopts an open, cross-domain Semantic Web-based framework that can accommodate the range and richness of particular community standards such as LIDO for museums, EAD for archives or METS for digital libraries.

Founded by Google, Microsoft, Yahoo and Yandex, vocabularies are developed by an open community process to create, maintain, and promote schemas for structured data on the Internet. These vocabularies cover entities, relationships between entities and actions, and can easily be extended through a well-documented extension model. vocabulary can be used with many different encodings, including RDFa, Microdata and JSON-LD.

GeoNames is integrating geographical data such as elevation, population, placenames in different languages, etc. from various sources. All lat/long coordinates are in WGS84 (World Geodetic System 1984). The GeoNames geographical database covers all countries and contains over eleven million placenames that are available for download free of charge. Users may manually edit, correct and add new names using a user friendly wiki interface.

TGN is a controlled vocabulary including names and associated information about places, such as their relationships, dates, sources, coordinates for current and historical cities, nations, empires, archaeological sites and physical features. TGN is intended to aid cataloging, research, and discovery of art historical, archaeological, and other scholarly information. Its unique thesaural structure and emphasis on historical places make it useful for other disciplines in the broader Linked Open Data cloud.

The Art & Architecture Thesaurus (AAT) is a multilingual and hierarchical thesaurus, which contains generic terms to describe art, architecture, design, style, process, technique, activity, abstract concepts and other material culture-related subjects. It can be applied as a referrential base for cataloging in museums and constructing the controlled vocabulary for digital collection datasets. AAT is published as a LOD-based dataset and can be downloaded in format types as JSON, JSON-LD, RDF, N3/Turtle and N-Triples.

ULAN is a structured vocabulary, including names, biographies, related people, and other metadata about artists, architects, firms, studios, museums, patrons, sitters, and other people and groups involved in the creation and study of art and architecture.

VIAF (Virtual International Autority File) is an OCLC service -- built in cooperation with national libraries and other partners -- that virtually combines multiple LAM (Library Archives Museum) name authority files into a single name authority service. The goal of the service is to lower the cost and increase the utility of library authority files by matching and linking widely-used authority files and making that information available on the Web.

DBpedia is a project to extract structured content from the information created in Wikipedia,which makes the information available on the Web. DBpedia allows you to ask sophisticated queries against Wikipedia and to link the different data sets on the Web to Wikipedia data.

Wikidata is a free, collaborative, multilingual, secondary database, collecting structured data to provide support for Wikipedia, Wikimedia Commons, the other wikis of the Wikimedia movement, and to anyone in the world.

Provided by the Open Knowledge Foundation since 2012, Linked Open Vocabularies (LOV) is an online platform gathering definitions of a set of classes and properties. Its main objective was to help publishers and users of linked data and vocabularies to assess, retrieve what was available for their needs, to reuse it as far as possible, and to insert their own vocabulary production seamlessly in the ecosystem.

The Datahub is an open and international data platform and collection of LOD-based data uploaded by multiple sources organized for distribution, sharing, and retrieving, based on the CKAN data management system. The Databub also provides free access to search for data, register published datasets, create and manage groups of datasets, and get updates from datasets and groups you're interested in.